The Progressive Dynamics INTELI-POWER MARINE series of marine battery chargers incorporate a built-in microprocessor that constantly monitors battery voltage. Depending on battery voltage and use, the microprocessor then selects one of three different charging voltages and one of four operating modes (Boost, Normal, Storage or Equalize) to ensure a safe rapid recharge. Ignition protected. 3 banks. 12 Volt. 2 year limited warranty. Dimensions 10.9"L x 7.8"W x 4.2"H.